Buckle for respiratory mask headgear



FIG. 1 is a front perspective view of a buckle for respiratory mask headgear showing a first embodiment of our new design;

FIG. 2 is a front view thereof

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a reverse perspective view thereof;

FIG. 9 is a front perspective view of a buckle for respiratory mask headgear showing a second embodiment of our new design;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof;

FIG. 14 is a left side view thereof;

FIG. 15 is a right side view thereof; and,

FIG. 16 is a reverse perspective view thereof. 

CLAIM The ornamental design for a buckle for respiratory mask headgear, as shown and described. 